Luxembourg and Greater Region glossary

CCSS

Centre commun de la sécurité sociale, the single desk where employers register every employee and through which all contributions pass. The CCSS issues the 13-digit national number that follows a person through the entire Luxembourg system.

CNS

Caisse nationale de santé, Luxembourg's health insurance. It works on an advance-then-refund basis: you pay the doctor, submit the invoice, get reimbursed. It also covers care received in a cross-border worker's country of residence.

IGSS

Inspection générale de la sécurité sociale. It produces the country's most granular employment statistics, including the count of cross-border workers by commune of residence — the source of the figures published on this site.

STATEC

The national statistics institute. Population, prices, wages, the consumer price index: it publishes the official series, and its index is what triggers wage indexation.

Arrival declaration

A new resident's first step: reporting to their commune's administration within days of moving in. Everything else depends on it — registration, tax card, access to communal services.

Guichet.lu

The national administrative portal, paired with MyGuichet for authenticated procedures. Almost every process is documented there, in French, German and English.

Commune

Luxembourg's basic administrative tier: one hundred communes, each with its aldermen, its budget and its local charges. The commune registers arrivals, runs the crèches and sets part of the cost of daily life.

Canton

The grouping of communes used for statistics and administrative organisation — twelve in all. It has no government of its own, but it is the grain at which much public data is released.

Tax class

Luxembourg sorts taxpayers into three classes — 1, 1a and 2 — by family situation. The class sets the applicable scale, and it is often the first lever a cross-border couple looks at, in particular through joint assessment on request.

Tax withholding card

The tax card an employer needs in hand to apply the right withholding at source. Without it, tax is withheld at the maximum rate — one of the most common nasty surprises on a first payslip.

Wage indexation

The sliding wage scale: when the consumer price index rises by a set step, all salaries, pensions and annuities are automatically lifted by the same percentage. It is a Luxembourg peculiarity, and it applies to cross-border workers too.

Minimum wage

Luxembourg's minimum wage comes in two tiers, unskilled and skilled, the second 20% higher. It is among the highest in the European Union and serves as the reference for many social thresholds.

Bëllegen Akt

The registration-duty tax credit granted when buying a home for one's main residence. It sharply reduces the deed costs of a first purchase — a line item calculated quite differently in each of the three neighbouring countries.

Childcare voucher scheme

The scheme that subsidises childcare — crèches, after-school care, extracurricular activities. It is open to cross-border workers' children, and is one of the sharpest gaps between Luxembourg and its neighbours in a family budget.

Tax treaty

The bilateral agreement that decides which state taxes what and prevents double taxation. It is what establishes that a Luxembourg salary is taxed in Luxembourg, and what sets the number of teleworkable days before things flip.

Progressionsvorbehalt

The German mechanism by which exempt income — a Luxembourg salary, for instance — is not re-taxed but lifts the rate applied to the household's other income. France applies a comparable logic through its effective-rate rule.

Observatoire de l'habitat

The body publishing Luxembourg housing prices and rents commune by commune. Its series feed the rents shown on this site — with the caveat, documented in our methodology, that its advertised €/m² sometimes describes the mix of dwellings on offer more than the price of a square metre.

Cross-border worker

Someone who lives in France, Belgium or Germany and works in Luxembourg, crossing the border at least once a week. The status opens Luxembourg rights (social security, allowances) while residence — and so the taxation of the household's other income — stays in the home country.

ADEM

Agence pour le développement de l'emploi, Luxembourg's public employment service. Registration is required to claim unemployment benefit in Luxembourg — a fully unemployed cross-border worker, by contrast, falls under their country of residence's scheme.

Luxembourgish

The national language, alongside French and German as administrative languages. Work happens overwhelmingly in French and English, but Luxembourgish remains the key to social integration and a condition of naturalisation.

Free public transport

Since 2020, buses, trains and the tram have been free across the whole of Luxembourg, no ticket or pass, in second class. For a cross-border worker only the foreign leg is paid — which shifts all the value towards border stations and P+Rs.

Park and ride

A park-and-ride attached to a station or major stop, designed so you leave the car before the funnel. Luxembourg's second-ring P+Rs fill early: arriving after 7:30 often means rejoining the traffic.

CFL

Luxembourg's railways. A short but dense network built around Luxembourg station, with cross-border links to Thionville, Metz, Arlon, Trier and Wasserbillig.

Line 90

The Luxembourg–Thionville–Metz rail axis, backbone of the French corridor and the most credible alternative to the A31. Its rush-hour crowding is the first topic of conversation among Moselle commuters.

Kirchberg

The plateau north-east of Luxembourg City holding the EU institutions, much of the financial centre and a university hub. The real destination of a large share of commutes — often further than "Luxembourg City" suggests.

Belval

The former steelworks site in Esch-sur-Alzette turned into a university, office and housing district, blast furnaces preserved. The emblem of the mining basin's transformation.

Minett

The south of the country, the old basin of the minette — the local iron ore. Esch, Differdange, Dudelange, Rumelange: the densest and most working-class communes in the Grand Duchy, and the closest to the French border.

Nordstad

The northern conurbation formed by Ettelbruck, Diekirch and their neighbours, on the rail axis and the A7. The classic compromise between gentler rents and twenty-five to thirty-five minutes from the capital.

Oesling

Luxembourg's Ardennes north: plateaux, deep valleys, scattered villages. The lowest rents in the country, and the longest commutes to the capital.

Gutland

The "good land": the southern half of the Grand Duchy, lower, more fertile and far more populated than the Oesling. It is where the large majority of residents live.

Mullerthal

"Little Luxembourg Switzerland" in the east: sandstone formations, gorges and hiking trails around Echternach. Tourist country more than commuter country.

Greater Region

The cross-border area formed by Luxembourg, Lorraine, Wallonia, Saarland and Rhineland-Palatinate. A shared living and employment basin of roughly eleven million people, with its own cooperation bodies and harmonised statistics.

Schengen

A wine village of a few hundred people where Luxembourg, France and Germany meet, and where the 1985 agreement was signed on the Moselle. The name travels better than the place.